The same physical quantity, such as density, can be reported using different units. You found that water has a density of 1000kg/m^3=1g/cm^3 . Because the density of water must be the same regardless of what units you use to measure it, you can conclude that an object whose density is 1 kg/m^3 must be less dense than water. In other words, 1 kg/m^3 is less than 1 g/cm^3. If you had three different objects with densities of 1 kg/m^3 , 1 g/m^3 , and 1 kg/mm^3 , which object would be the most dense?

The object that is the most dense is 1000 grams per cubic milimeter.

Explanation:

A cubic meter is equal to 1,000,000,000 cubic milimeters, 1 kilogram is equal to 1000 kilograms. First, we convert each quantity to grams per cubic milimeter:

a)

b)

c)

A greater density means that an object is more dense, therefore, the object that is the most dense is 1000 grams per cubic milimeter.

nacl is added to the aqueous of what? ? in order to get a proper answer you have to specify the exact composition of the aqueous solution.